有机体
发表于 2025-3-26 23:41:53
GeoGuidehttp://image.papertrans.cn/u/image/941431.jpg
慢跑鞋
发表于 2025-3-27 01:58:58
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Minikin
发表于 2025-3-27 07:47:44
Some Notes About Rock Namesd by some kind of physical medium such as water, ice or wind, or by chemical precipitation, and then hardened by becoming cemented or compressed. The main sedimentary rocks that we will come across in this book are sandstone, which is formed of cemented grains of sand, and limestone, which is formed of the chemical calcium carbonate.
我说不重要
发表于 2025-3-27 11:08:22
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Ptosis
发表于 2025-3-27 13:36:21
The Great Gorges: Slices Through Timeenge to travellers, and indeed to any kind of communication, across the highlands of Ethiopia throughout her history. To the geologist, however, they are a boon, as they slice through the great pile of rock formations of which the highlands are built, revealing the geological story which the different layers tell.
粗糙
发表于 2025-3-27 18:01:44
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不感兴趣
发表于 2025-3-27 23:28:56
Geological Time1st January. Multicellular life appeared during mid-November and mammals on the 15th December. The dinosaurs died out on the 27th December and . (us!) appeared at 11.40 pm on the 31st December. On this scale the life of an average person would be about half a second!
Biguanides
发表于 2025-3-28 03:06:43
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subacute
发表于 2025-3-28 08:48:18
The Big Picture become apparent, she occupies a unique position. Inevitably, some terms will be introduced here that may not be familiar to you, but which will be very useful when you come to read the chapters which follow. Such terms are indicated in bold, and I have tried to explain them as clearly as possible.
蜿蜒而流
发表于 2025-3-28 13:34:22
Geological Time million years or so to happen. Compared to the age of the earth, which is just over four and a half billion years, this is indeed a short period but in a human timeframe it is vast. It is easy for geologists to become complacent about the immensity of geological time, and difficult for non-geologis